2:222
وَيَسْأَلُونَكَ عَنِ الْمَحِيضِ قُلْ هُوَ أَذًى فَاعْتَزِلُواْ النِّسَاء فِي الْمَحِيضِ وَلاَ تَقْرَبُوهُنَّ حَتَّىَ يَطْهُرْنَ فَإِذَا تَطَهَّرْنَ فَأْتُوهُنَّ مِنْ حَيْثُ أَمَرَكُمُ اللّهُ إِنَّ اللّهَ يُحِبُّ التَّوَّابِينَ وَيُحِبُّ الْمُتَطَهِّرِينَ
They ask thee concerning women's courses. Say: They are a hurt and a pollution: So keep away from women in their courses, and do not approach them until they are clean. But when they have purified themselves, ye may approach them in any manner, time, or place ordained for you by Allah. For Allah loves those who turn to Him constantly and He loves those who keep themselves pure and clean.
65:5
ذَلِكَ أَمْرُ اللَّهِ أَنزَلَهُ إِلَيْكُمْ وَمَن يَتَّقِ اللَّهَ يُكَفِّرْ عَنْهُ سَيِّئَاتِهِ وَيُعْظِمْ لَهُ أَجْراً
That is the Command of Allah, which He has sent down to you: and if any one fears Allah, He will remove his ills, from him, and will enlarge his reward.